Bump shell version to 8.0.16

Author: ltangvald

VERSION

@@ -7,8 +7,8 @@ MYSQL_SERVER_VERSIONS["8.0"]=8.0.16
 
 declare -A MYSQL_SHELL_VERSIONS
 MYSQL_SHELL_VERSIONS["5.6"]=""
-MYSQL_SHELL_VERSIONS["5.7"]=8.0.15
-MYSQL_SHELL_VERSIONS["8.0"]=8.0.15
+MYSQL_SHELL_VERSIONS["5.7"]=8.0.16
+MYSQL_SHELL_VERSIONS["8.0"]=8.0.16
 
 declare -A FULL_SERVER_VERSIONS
 FULL_SERVER_VERSIONS["5.6"]="${MYSQL_SERVER_VERSIONS["5.6"]}-${IMAGE_VERSION}"